Film guide roller



- April 12, 1932.

J. TSCHOPP 1,854,004

FILM GUIDE ROLLER Filed July 26. 1927 Invenor AJacob Tchopp., b3!

Patented Apr. 12, V1932 UNITED STATES PATENT OFFICE JACOB T SCHOPP, OF SCHENECTADY, NEW YORK, ASSIGNOB TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK FILM GUIDE ROLLER Application filed July 26, 1927.

My invention relates to apparatus employing a photographic film such as a motion picture machine, apparatus for recording sounds on, or apparatus for reproducing sounds from a film and an object of my invention is the provision of an improved guide roller for the film.

My invention will be better understood from the following description taken in connection with the accompanying drawings, and its scope will be pointed out in the appended claims.

Referring to the drawings, Fig. 1 is a cross section of a guide roller involving my invention and Fig. 2 is a perspective View of the same as it appears engaged by a film.

In the drawings, 1 is a stud or post upon which is journalled the rotatable portion of the roller. It has the shoulder 2 and the retaining member 3 which is shown screwed into the outer end thereof and in which is set the oiler 4, suitable oil passages being provided through the stud and the retaining member. The rotatable portion comprises the cylindrical member 5 having the flange 6 and constructed to have bearings on the stud at axially spaced points. Slidably mounted on the member 5 is the hollow cylindrical member 7 having the flange 8, and within this member is the light coil spring 12 abutting at opposite ends against the member and the adjusting nut 13 threaded on the member 5. I have shown the wear plate 14 between the end of member 5 and the retaining member 3 and the diameter of this plate is such that the flanged end of member 7 when moved to the right as seen in drawings against the spring will freely pass past the plate. In accordance with this construction the spring en- Serial No. 208,644.

that will be used or the narrowest portion thereof so that the two edges of the film as it pasess over the roller always engage the respective flanges. While I have shown member 5 having the portion 16 integral therewith it may be found expedient to make this portion separate from but secured to member 5. Since member 5 is held against the shoulder 2 of the stud, that edge of the film which contacts with flange 6 is thereby guided to run in a relatively fixed position. Any variation in the width of the film will be taken up by the automatically adjustable member 7. The spring 12 is relatively light and may be adjusted by turning the nut 13.

lVhat I claim as new and desire to secure by Letters Patent of the United States, is:

1. A film guide roller comprising a fixed stud, a plurality of rotatable flanged members mounted thereon to have relative axial movement, and a resilient member enclosed by one of said members and arranged to engage said members for moving them toward each other and to be rotatable therewith for producing said relative axial movement.

2. A film guide roller comprising a fixed stud, a pair of rotatable flanged members thereon, one of said members being mounted on the other for axial movement relative thereto, and a resilient member engaging said flanged membermounted on the first member,

one of said members being hollow, and a compression spring within the hollow member and engaging both said members for causing vthe fianges thereof to move toward each other.

1:5. A ilm yguide roller comprising a fixed stud, a cylindrical flanged member journalled I thereon, means for retaining the member on -the stud, a second flanged member journalled on the rst member and axially slidable thereon independent of said retaimng means,

and a spring enclosed by said second member 4and rotatable therewith for slidin the second member relative to the first mem r. 6. A film guide roller comprising a fixed stud having a shoulder and a retainin` member spaced therefrom', a cylindrical anged member journalled on thestud between the shoulder and the retaining member, a hollow cylindrical hanged member mounted on the first member, a. spring Within said hollow member engaging the same at one end, an adjustable member on said first member engaging the spring at the other end, one of said members having gaging portion for l1miting the distance between the flanges of said members.

In witness whereof I have hereunto set my hand this 23d day of July, 1927.

l JACOB TSCHOPP.

a peripheral film en- 

